Cylinder-grinding machine.



M. MILKOP.

CYLINDER GRINDING MACHINE.

APPLICATION FILED JULY 13, 1914.

I 14,376. Patented Oct. 20, 1914.

2 SHEETSSHEET 1 wi tneooaa J v W Q /%WW (Conn/43 M. MILKOP.

CYLINDER GRINDING MACHINE.

APPLICATION FILED JULY 13, 1914.

1,1 14,376. Patented Oct. 20, 1914 2 SHEETS-SHEET 2.

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attozwzg UNITED STATES {PATENT OFFICE.

MARTIN MILKOP, 0 LONG ISLAND CITY, YORK.

CYLINDER-GRINDING MACHINE.

Specification of Letters Patent. j Patented Oct. 20,1914.

Application filed July 13, 1914. Serial No. 850,661.

To'all whom it may concern Be it known that I, MARTIN MILKOP, a subject of the Emperor of Russia, residing at Long Island City, in' the county of Queens and State of New York, have invented certain new and useful Improvements in Cylinder-Grinding Machines; and I do bodies; and it consists in the novel construction and combination of the parts hereinafter fully described and claimed.

In the drawings, Figure 1 is a side view of a cylinder grinding machine constructed according to this invention, partially in section, and showing some parts omitted for clearness. Fig. 2 is a plan view of the footstep and its clamping devices. Fig. 3 is a cross-section through the hollow shaft, taken on the line 'mx in Fig. 1, and showing the I motor and grinding wheel. Fig. 4 is a diaconvenient fastening devices.

gram of the motor. Fig. 5 is a plan view of the reversible automatic feed mechanism. Fig. 6 is a side view of the same, showing also the internal toothed wheels in section. Fig. 7 is a detail plan view of the stationary portion of the telescopic. frame.

The supporting frame is formed in two telescopic sections 2 and 3, and the lower section 2 has lugs or flanges 1 at its base by means of which it can be secured to the upper end of a cylinder 5 by any suitable clamping devices.- The lower section 2 has vertical guides 6, and the upper section 3 has slide bars 7, which are slidable vertically in the guides 6, and which are secured after adjustment by set-screws 8 or any other The upper frame section 3 has also a bearing 9 which is arranged upon the axis of the cylinder to be ground. A hollow shaft 10 is provided, 7

and is journaled in the bearing 9, and it projects downwardly into the cylinder. The lower end of the shaft 10 works in a footstep 12 which is clamped to the cylinder. The lower end of the shaft 10 has a'projection 14 which runs in a cup .15 on the footstep,

and an antifriction ball 16is interposed between the projection 14: and the cup, and runs in suitable ball races, so as to minimize the friction. The footstep 12 is provided with radial guides 17 and 18 are curved clamping jaws for engaging with the cylinder. The jaws 18 have slides 19 which slide radially in the guides 17, and screws 20 are provided for sliding the jaws in and out. The screws 20 engage with screwthreaded holes 21 in the slides 19, and are journaled in bearings 22 on the footstep. Worm wheels 24 are secured to the screws 20, and 25 are worms which gear into the worm wheels. The worms 25 are secured on shafts 26, which are journaled in hearings in the footstep, and which have square end portions 27 to receive any suitable key or wrench. The shafts 26 arerevolved by hand so as to clamp the footstep in the lower part of the cylinder to be ground and adjust it accuratelyv in linewith the axis of the cylinder. The hollow shaft 10 has a longitudinal guide slot 30 in one side of it, and 31 is a crosshead which is slidable longitudinally in the shaft 10, and which projects from the .slot 30. "The crosshead 31 has a screwthreaded hole 32 for engaging with the feed screw 33. The laterally pr'ojecting ortion of the crosshead has a guide 34, and 35 is a slide which is slidable in the a guide 34 crosswise of the axis of the feed screw. An adjusting screw 36 is journaled in the crosshead 31, and engages with a screwthreaded hole 37 in the slide 35. A worm wheel 38 is secured on the screw 36,

and a worm 39 gears into the worm wheel 38. The worm 39 has a shaft 40 journaled in the crosshead, and having a square portion 41 for the attachment of a suitable wrench for adjusting the slide 35 by hand.

An electric motor -15 of any approved construction is carried by the slide 35, and it has a motor shaft 46 on which the grinding wheel 47 is secured. The motor is preferably made of great length in proportion to its diameter, so that a small grinding wheel can be used, and so that cylinders of small diameter can be ground. A commutator box 50, of insulating material, is secured to the slidable section 3 of the 'telescopic frame, and contact rings 51 and 52 are secured inside this box, and are connected to the line wires 53 and 54, The contact rings 51 nd 52 are provided with insulated brushes 55 and 56 respectively,

which are carried bythe hollow shaft 10.

nected to the motor by a similar wire 58. The motor revolves the grinding wheel on its own axis continuously as long as current is supplied by the line wires.

The grinding wheel is gyrated around the axis of the cylinder by hand, and a beveled toothed wheel 60 is secured on the upper end portion of the hollow shaft 10 for that purpose. A beveled toothed pinion 61 gears into the wheel (30, and is secured on a shaft 62 which is journaled in a' bearing 63 on the frame. The shaft 62 is revolved by a crankhandle 64, or any other approved means.

The feed screw 33 is journaled in a bearing 65, supported by the wheel 60 or in any other approved way, and it has acrankhandle 66 secured on its upper end, for revolving it by hand and affording a means for raising and lowering the crosshead and grinding wheel rapidly, whenever required.

In order to provide an automatic longi tudinal traverse mechanism for the crosshead and grinding wheel, the wheel 60 has an internal toothed wheel 68 formed on or secured to it, and an internal toothed wheel 69 is secured on the upper end portion of the feed screw 83. A pin 70 is arranged to project downwardly from the frame section 3, and a toothed idle wheel 72 is journaled on the pin 70, and gears into the lower internal wheel 68. A shaft 73 is journaled in a bearing 74- on the frame section 3, and is arranged parallel to the pin 70, and a toothed pinion 75 is secured on the lower end of the shaft 73 and gears into the idle wheel 72. A toothed pinion 76 is secured 'on the upper end portion of the shaft 73,

and a reversing'lever 7 8 is also pivoted on the shaft 73.

The reversing lever 78 is a double bellcrank lever, and it has pins 80 and 81 which project from. its arms uponlopposite sides of its pivot. Toothed wheels 82 and 83 are journaled on the pins 80 and 81 respectively, and are arranged to gear into the upper internal toothed wheel 69. The reversing lever can be held in any desired position by any suitable catch or fastening, and the direction of the feed is determined by the wheels 82 and 83 which are placed alternately into and out of gear with the wheel 69.

When the reversing lever is placed in an intermediate position, neither ofthe wheels 82 and 83 will drive the wheel 69, and the feed screw can be operated rapidly, by hand by means of the crank-handle '66.

When the position of the grinding wheel in the cylinder has been adjusted, the electric motor is started so that the grinding wheel is revolved rapidly. The grinding wheel is gyrated in the cylinder by turning the crankhandle 6%, and the feed screw traverses the grinding wheel longitudinally in the cylinder automatically, as long as the cranlr -handle ea is revolved and. the automatic feed mechanism is held in operation by the reversing lever.

What I claim is:

1. In a cylinder grinding machine, the combination, with a supporting frame, a hollow shaft journaled therein, and driving mechanism for revolving the hollow shaft; of a crosshead slidahle longitudinally in the hollow shaft, an electric motor carried by the crosshead and provided with a grinding wheel arranged eccentric of the hollow shaft, a feed screw'journaled concentric with the hollow shaft and engaging with the crosshead, and reversible controlling mechanism arranged betweeen the said driving mechanism and the feed screw for revolving it 'automatically in each direction and for disengaging it from the driving mechanism.

2. In a cylinder grinding machine, the combination, with a supporting frame provided with means for securing it to one end portion of a cylinder, and a footstep provided with fastening devices for securing it to the other end portion of the cylinder; of a hollow shaft journaled in the said frame and footstep, a crosshead slidable longitudinally in the hollow shaft, anelectric motor carried by the crosshead and provided with a grinding wheel arranged eccentric of the hollow shaft, driving devices for revolving the hollow shaft, .and feed mecha nism for moving the crosshead longitudinally.

3. In a cylinder grinding machine, the combination, with a supporting frame provided with means for securing it to one end portion of a cylinder, of a footstep provided with radial guides, clamping jaws which work in the said guides, means for sliding the jawsv independently of each other to clamp the footstep in the other end portion of the cylinder, a hollow shaft journaled in the said frame and footstep, a ball bearing interposed between the lower end. of the hollow shaft and the footstep, a crosshead slidahle longitudinally in the hollow shaft, an electric motor carried by the crosshead and provided with a grinding wheel arranged eccentric of the hollow shaft, and feed mechanism for moving the crosshead longitudt nally.

4. In. a cylinder grinding machine, the combination, with a supporting frame, a non-slidalole main shaft journaled therein, and driving mechanism for revolvi the main shaft; of a crosshead slidahle lon itudinally on the main shaft and revolving with it, an electric motor provided a grinding wheel and carried by the said crosshead, feed mechanism for sliding the crosshead baclr and forth, and reversible controllingmechanisin arranged between the, said driving mechanism and feed mechanism.

5. In a cylinder grind' arranged eccentric of the hol ow sha combination, with a telescopic supporting frame one section of which is provided with means for securing it to one end portion of a cylinder, of a footstep provided with means for securing it to the other end portion of the cylinder, a hollow shaft journaled in the slidablesection of the frame and in the said footstep, means for locking the sections of the frame together, a crosshead slidablelongitudinally in the hollow shaft, an electric motor carried by the crosshead and provided-with a inding wheel t, driving devices for revolving the hollow shaft,

and feed mechanism for moving the cross head longitudinally.

6. In a cylinder grinding machine, the combination, with a supporting frame provided with means for securing it to one end portion of a cylinder, and a footstep provided with fastening devices for securing it to the other end portion of the cylinder; of hollow shaft journaled in the said frame and footstep, a crosshead slidable longitudinally in the hollow shaft, an electric motor carried by the crosshead and provided with a grinding wheel arranged eccentric of the hollow shaft, insulated contact rings secured to the said frame, insulated brushes carried by the hollow shaft and bearing on the contactrings, connecting wires between the contact rings and the electric motor, driving devices for revolving the hollow shaft, and feed mechanism for moving the crosshead longitudinally.

In testimony whereof I afiix my signature, in the presence of two witnesses.

MARTIN MILKOP.

Witnesses: v H. OLEoN,

JOHN MCGOWAN. 

